Wirthiotrema xanthopustulatum

Wirthiotrema xanthopustulatum
Scientific classification
Domain:	Eukaryota
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lecanoromycetes
Order:	Graphidales
Family:	Graphidaceae
Genus:	Wirthiotrema
Species:	W. xanthopustulatum
Binomial name
	Wirthiotrema xanthopustulatum; Aptroot & M.F.Souza (2021)

Wirthiotrema xanthopustulatum is a species of corticolous (bark-dwelling) lichen in the family Graphidaceae. Found in Brazil, it was formally described as a new species in 2021 by lichenologists André Aptroot and Maria Fernanda de Souza. The type specimen was collected in Tagaçaba Porto da Linha (Guaraqueçaba, Paraná) on tree bark. It has a pale olivaceous, shiny metallic-green thallus that covers an area up to 10 cm (4 in) in diameter. It contains the secondary compounds protocetraric acid and lichexanthone. This latter compound causes the lichen thallus to fluoresce a yellow colour when shone with a long-wavelength UV light. Wirthiotrema santessonii is similar in appearance, but it contains stictic acid rather than protocetraric acid and lichexanthone.[1]

References

Aptroot, A.; Souza, M.F. (2021). "New crustose lichens from a tropical coastal area in Paraná (Brazil)". Cryptogamie, Mycologie. 42 (12): 191–197. doi:10.5252/cryptogamie-mycologie2021v42a12. S2CID 244271661.

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[Aptroot_&_Souza_2021-1] Aptroot, A.; Souza, M.F. (2021). "New crustose lichens from a tropical coastal area in Paraná (Brazil)". Cryptogamie, Mycologie. 42 (12): 191–197. doi:10.5252/cryptogamie-mycologie2021v42a12. S2CID 244271661.